Totally coincidentally, Slate picks up the story three days after TreeHugger, and notes that there was opposition then

Not everyone was pleased; some branded them "glum spugs" and predicted "death by spugitis." One fellow actress claimed Mrs. Belmont's group was nothing more than a cover for tightwads. And advertisers responded in their usual way: by instantly co-opting the movement. "RUGS FOR SPUGS," a Harlem furniture store crowed in the New York Evening World, adding its own explanation of the acronym: "Special Prices on Useful Gifts."

Google books/Public Domain

This is an interesting approach that we can emulate in the Internet age: this ad promoted cards instead of presents; today, we can donate to charities online and have them send an email card to your gift recipients. It should be noted that SPUG was not against gifts; as website Off-center Views noted last year,

Were SPUG advocates forerunners of Dr. Seuss’s Grinch? Nope. They had no objection to giving per se–they simply wanted to stop the practice of spending money on novelties, junk, and baubles and shift it to useful things. They reasoned that if one is going to shell out for a gift, it ought to be something the recipient can actually use or appreciate.

That's something every TreeHugger could get behind. John Ruskin put it best, long before SPUG:

If you want a golden rule that will fit everything, this is it: Have nothing in your houses that you do not know to be useful or believe to be beautiful.

fox news/Screen capture

Let's take the War on Christmas back from Fox Nation, which is completely unserious, putting naked women next to the baby Jesus. It's not just atheists and liberal elites who have problems what happens with this season, but all of SPUG nation.